Disproportionated Rosin


Disproportionated rosin (DPR) is compound of dehydroabie acid and dihydroabtice acid, the DPR is processed through catalytic reaction of gum rosin on proper temperature. In the synthetic rubber industry, DPR is used as emulsifier in the producing of various product including styrene-butadiene rubber, chloroprene rubber, acrylonitrile-butadiene rubber and acrylonitrile-butadiene-styrene rubber. Using DPR as an emulsifier, rubber product will improve in cohesion, the endurance to heat will increase for 25%. The endurance to both abrasion and laceration of this rubber is better than ordinary styrene-butadiene rubber. The cohesion will be greatly enhanced if blending with natural rubber.

 

DPR can be also used for important component of potassium soaps which serve as emulsifiers to improve and strengthen the quality of synthetic rubbers, a raw material for making adhesives, water-based PSA, pigment, and chewing gum.

Suggested Application


  • Chewing gum
  • Important component of potassium soaps which serve as emulsifiers to improve and strengthen the quality of synthetic rubbers
  • Pigment
  • Raw material for making adhesives
  • Water-based PSA

Specification


 

DPR First Grade

DPR Extra Grade

Colour:

not darker than rosin color grade

Abietic Acid, %:

0.5 max 0.1 max

Dehydroabietic Acid, %:

45.0 min 52.0 min

Softening Point (R&B), °C:

75.0 min 75.0 min
Acid Value, mg KOH/g: 150.0 min 155.0 min
Unsaponifiable Material, %: 12.0 max 10.0 max

Storage


  • Kept away from heat and flame

REMARK

The above information is believed to be accurate and presents the best explanation currently available to us. We assume no liability resulting from above content. The technical standards are formulated and revised by customers’ requirement and us, if there are any changes, the latest specification will be executed and confirmed in the contract.